Described are a high pressure carbamate condenser, urea plant, and urea production process. The high pressure carbamate condenser as described is of the shell-and-tube heat exchanger type with a tube bundle and has a redistribution chamber connected to tubes of the tube bundle and to a duct. The duct extends between the redistribution chamber and the shell.

The invention provides a clog-free condensation system for a pyrolysis apparatus used in the thermal degradation of waste plastics that contain polyethylene terephthalate (PET). A conduit carries vapor from a pyrolysis reactor to a condenser having an inlet for an oil-immiscible solvent stream; a liquid outlet for removal of the oil-immiscible solvent, benzoic acid, and other condensed pyrolysates; and a vapor outlet to pass uncondensed vapors. A liquid-liquid phase separator connected to the liquid outlet continuously separates the two immiscible phases. Benzoic acid is precipitated and removed from the oil-immiscible phase, and the oil-immiscible solvent is returned to the condenser as a solvent stream. The invention provides a method for condensing PET pyrolysis vapors without formation of clogs in the condensation apparatus, and provides a method for the continuous recovery of benzoic acid and other condensable pyrolysates from a PET-containing waste plastic stream.

The present invention discloses an integrated new technique and apparatus for recycling volatile organic compounds of coating printing. The new technique collects a mixed gas of volatile organic compounds produced in the process of coating and drying of a coating machine with a volatiles collecting hood of coating machine, compresses and lead the mixed gas of volatile organic compounds into a condensation system for condensation; the obtained condensate enters a gas-liquid separator to obtain a coating solvent with high concentration; non-condensable lean gas enters a membrane separation and enrichment system to obtain a mixed gas of high concentration organic compounds after membrane separation and enrichment with a complete set of membrane assembly, and then returns to front of the condensation system to repeat the integrated technique. The separation membrane as claimed in the present invention has an extremely high permselectivity for volatile organic compounds of coating printing and can quickly enrich the volatile organic compounds. Recycling rate of volatile organic compounds of the apparatus may reach 90%, and the content of organic compounds in the tail gas emission after treatment is no more than 1 g/m.sup.3. This integrated new technique largely reduces the production cost of coating printing industry and at the same time protects the atmospheric environment.

A system and method for recovering a sterilization agent from waste gaseous mixture, comprising a gas separator to wash waste gas comprising a gaseous mixture of a sterilization agent, insert dilution gases, and water vapor, from plurality sterilization chambers, with water, thereby producing a water-gaseous sterilization agent mixture collected at bottom section of the gas separator, and inert dilution gases exhausted at top section of the gas separator; a pressure reducing valve; a first tank or gas evaporator to produce gaseous sterilization agent and water vapor; a first condenser to produce condensed water vapor and separate the gaseous sterilization agent from the condensed water vapor; a water tank to receive the condensed water vapor; a separation pump for raising pressure of the gaseous sterilization agent; a second condenser to cool the gaseous sterilization agent causing the sterilization agent to condense into liquid; and a second tank for storing the liquid sterilization agent.

The present disclosure is related to systems and methods for the biological processing of hydrocarbon-containing substances. In particular embodiments, the systems and methods herein relate to pre-digestion of hydrocarbon containing substances and further processing of the same to produce hydrocarbon fuels, fertilizer, and other products.

Disclosed is a shell-and-tube heat exchanger type with a tube bundle and has a redistribution chamber connected to tubes of the tube bundle and to a duct. The duct extends between the redistribution chamber and the shell.

The quick response system and method for removing volatile compounds from contaminated water disclosed herein may comprise, at least, a preconditioning stage, a stripping stage, a condenser stage, a refrigeration stage, and a scrubber stage. The present invention relates to a portable system and method that can be deployed on an emergency or quick response basis to purify aqueous streams containing volatile organic compounds (VOC) and chlorinated hydrocarbons, collectively volatile compounds (VC), emitted from petroleum and chemical processing facilities. The system allows manufacturing facilities having internal cleanup issues to become compliant with environmental standards and guidelines quickly. Once the issue in the petroleum facility are fixed, this method can be demobilized and removed from the site in a short period of time.

A system and method for expanding the production capacity of an existing ethanol production facility including: a source of fermented mash (beer); a first beer column configured for receiving beer input from the source and for producing overhead comprising alcohol vapor and water vapor; and a first rectifier receiving an alcohol and water mixture from said first beer column. The system includes a second beer column, first and second condensers receiving overhead from the beer columns and a second rectifier receiving condensed overhead from the second condenser and bottoms from the first rectifier. A processing component receives bottoms from the first and second beer columns and steam condensate. The method includes the steps of retrofitting an existing ethanol production facility with a second beer column, first and second condensers and a second rectifier.

The present invention discloses intelligent oil sludge treatment apparatuses and treatment processes. The treatment apparatus includes an integrative machine, an oil removal machine, a separation machine, a sludge collection tank, a dewatering machine, a pyrolysis machine, an agent tank, a deodorization tower, a crude oil tank, a light oil tank, a separator, a condenser, a desulfurization tower, a clean water tank, a sewage plant, and a steam boiler, where an outlet of the integrative machine is connected to an inlet of the oil removal machine; the oil removal machine is configured to remove crude oil from oil slurry; the oil removal machine collects the crude oil to the crude oil tank, discharges stench into the deodorization tower, and discharges the slurry into the separation machine; the separation machine is configured to perform a solid-liquid separation operation; the dewatering machine is configured to evaporate water and then convey same into the condenser, and to convey dry sludge into the pyrolysis machine; the pyrolysis machine is configured to convey pyrolysis gas into the condenser; the condenser is configured to discharge a condensate into the separator; an outlet of the separator is connected to the sewage plant and the light oil tank, separately; an inlet of the desulfurization tower is connected to the condenser, and an outlet thereof is connected to the steam boiler; the clean water tank is configured to supply a water source; and the steam boiler provides a heat source for the integrative machine and the oil removal machine.

The present disclosure is related to systems and methods for the biological processing of hydrocarbon-containing substances. In particular embodiments, the systems and methods herein relate to pre-digestion of hydrocarbon containing substances and further processing of the same to produce hydrocarbon fuels, fertilizer, and other products.